Argus Radar - SERIAL INTERFACE SPECIFICATIONS
988-10187-004 2.6
VDO – AIS VHF data-link own-vessel report
This sentence is used to transfer the entire contents of an AIS unit’s broadcast message
packet, as defined in ITU-R M.1371 and as sent out by the AIS unit over the VHF data link
(VDL) using the “six-bit” field type. The sentence uses the same structure as the VDM
sentence formatter.
!--VDM,x,x,x,a,s—s,x*hh<CR><LF>
Number of fill-bits, 0 to 5 (see Note 5)
Encapsulated ITU-R M.1371 radio message (see Note 4)
AIS channel (see Note 3)
Sequential message identifier, 0 to 9 (see Note 2)
Sentence number, 1 to 9 (see Note 1)
Total number of sentences needed to transfer the message,
1 to 9 (see Note 1)
NOTES 1
To 5 See VDM sentence notes.
ALR – Set alarm state
Local alarm condition and status. This sentence is used to report an alarm condition on a
device and its current state of acknowledgement.
$--ALR,hhmmss.ss,xxx,A, A,c--c*hh<CR><LF>
Alarm’s description text
Alarm’s acknowledge state, A = acknowledged
V = unacknowledged
Alarm condition (A = threshold exceeded, V = not exceeded)
Unique alarm number (identifier) at alarm source
Time of alarm condition change, UTC
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